I bought a couple of these for around the house. https://a.co/d/5vjsVs3 Works very well but mostly at night.
Also to make sure you regularly do the dishes, take out trash and clean up any food sources for the flies. After using the above and doing the above, mine went from insanity to maybe 1 or 2 around the house in about a week or two.
Going off of SMCF, it really depends on how liquid you are and what country you’re in.
If you’re in the US, I have SoFi and 4.5%/APY on my savings account. Gotta have your direct deposit or move $5k monthly into the checking. If you can swing that, it’s a great bank. I think Ally does similar.
Most major brick and mortar banks are shite for accruing interest money.